261028453 has 8 divisors (see below), whose sum is σ = 298839872. Its totient is φ = 223347456.

The previous prime is 261028399. The next prime is 261028477. The reversal of 261028453 is 354820162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 261028453 - 2⁹ = 261027941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261028483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28275 + ... + 36352.

It is an arithmetic number, because the mean of its divisors is an integer number (37354984).

Almost surely, 2^261028453 is an apocalyptic number.

It is an amenable number.

261028453 is a deficient number, since it is larger than the sum of its proper divisors (37811419).

261028453 is an equidigital number, since it uses as much as digits as its factorization.

261028453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65211.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 261028453 is about 16156.3749956480. The cubic root of 261028453 is about 639.0908747189.

The spelling of 261028453 in words is "two hundred sixty-one million, twenty-eight thousand, four hundred fifty-three".